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我从文本文件中删除了一些行,但工作正常,但空白行有问题。 那些仍然在.txt文件中,我不知道如何删除或放置这些我搜索谷歌和这里的解决方案,但我失败了。 有没有人知道我如何删除空行? 我试了一下:Java删除txt文件中的空白行
currentLine.trim().length() == 0); but still with out success
坦克
public static String COMMENT_LINE = "--.*";
public static String CREATE_BUFFERPOOL = "CREATE BUFFERPOOL.*";
public static String GRANT_USE = "GRANT USE.*";
public static String CONNECT_TO = "CONNECT TO.*";
public static Logger log = Logger.getLogger(Main.class);
//CHANGE PATH
public static String INPUT_FILE_PATH = "C://Users//dpa//Desktop//BW//bwcsvtest.txt";
public static String OUTPUT_FILE_PATH "C://Users//dpa//Desktop//BW//BWFormated.txt";
public static String TRANSFORM_FILE_PATH = "C://Users//dpa//Desktop//BW//BWtransformed.txt";
public static String CSV_FILE_PATH = "C://Users//dpa//Desktop//BW//result.csv";
public static void main(String[] args) throws IOException {
//log.debug("Formating File");
formatTxt(INPUT_FILE_PATH,OUTPUT_FILE_PATH);
log.debug("Formating File complete");
//CsvTransformer csvTransformer = new CsvTransformer(OUTPUT_FILE_PATH,TRANSFORM_FILE_PATH);
//csvTransformer.parseCSVInput();
//csvTransformer.writeDataToCsv(CSV_FILE_PATH);
}
public static void formatTxt(String inputFilePath, String outputFilePath) throws IOException {
File inputFile = new File(inputFilePath);
BufferedReader reader = new BufferedReader(new FileReader(inputFile));
File tempFile = new File(outputFilePath);
BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));
String currentLine;
while ((currentLine = reader.readLine()) != null) {
currentLine = currentLine.trim();
if (currentLine.matches(COMMENT_LINE)) {
log.debug(currentLine);
log.debug("Commentline deleted");
continue;
}
if (currentLine.matches(CREATE_BUFFERPOOL)) {
log.debug(currentLine);
log.debug("CREATE BUFFERPOOL deleted");
continue;
}
if (currentLine.matches(GRANT_USE)) {
log.debug(currentLine);
log.debug("GRANT USE deleted");
continue;
}
if (currentLine.matches(CONNECT_TO)) {
log.debug(currentLine);
log.debug("CONNECT TO deleted");
continue;
}
writer.write(currentLine.replace("\t", ""));
writer.newLine();
}
reader.close();
writer.close();
}
}
首先,我会建议使用'如果/否则如果'在'formatTxt'方法中。由于它被编码,它会每次都有效地重新测试相同的字符串,一旦它确定了它是哪一行,就不应该这样做。其次,我没有看到你想要删除的线路。我希望你的'formatTxt'中有一个'if',用于测试这行是否为空,而不是像其他块一样。 – CodeChimp
@CodeChimp“因为它是编码的” - >在每个“if”块的末尾有一个“continue”,所以不会,它不会重新测试 – fge
您的权利很早,而且我通常不会使用'继续',所以它没有注册。不过,我仍然期望看到空字符串的测试。 – CodeChimp